Add chlog CLI with chcat/chtail/chgrep entrypoints

Single Go binary for the ClickHouse log store (logs.raw): chlog with
cat/tail/grep subcommands, plus chcat/chtail/chgrep argv[0]-dispatched
symlink entrypoints. Every query is time-bounded and fully parameterized;
chgrep guards wide unfiltered scans. Ships nfpm RPM with completions and
woodpecker PR/tag pipelines mirroring node-lookup.

Makefile

@@ -0,0 +1,67 @@
+BINARY  := chlog
+# chcat/chtail/chgrep are argv[0]-dispatched symlinks to the single chlog binary.
+LINKS   := chcat chtail chgrep
+DIST    := dist
+VERSION := $(shell git describe --tags --always --dirty 2>/dev/null || echo dev)
+GOFLAGS := -ldflags="-s -w -X main.version=$(VERSION)"
+OS      ?= $(shell go env GOOS)
+ARCH    ?= $(shell go env GOARCH)
+
+.PHONY: all build test lint fmt clean install completions rpm rpm-package patch minor major _tag
+
+all: build
+
+build:
+	CGO_ENABLED=0 GOOS=$(OS) GOARCH=$(ARCH) go build $(GOFLAGS) -o $(DIST)/$(BINARY) .
+	@for l in $(LINKS); do ln -sf $(BINARY) $(DIST)/$$l; done
+
+test:
+	go test -v -race ./...
+
+lint:
+	golangci-lint run ./...
+
+fmt:
+	gofmt -w .
+
+clean:
+	rm -rf $(DIST)
+
+install:
+	go install $(GOFLAGS) .
+
+# Generate bash/zsh/fish completions for chlog and each symlink entrypoint.
+completions: build
+	@mkdir -p $(DIST)/completions
+	@for b in $(BINARY) $(LINKS); do \
+		$(DIST)/$$b completion bash > $(DIST)/completions/$$b.bash; \
+		$(DIST)/$$b completion zsh  > $(DIST)/completions/_$$b; \
+		$(DIST)/$$b completion fish > $(DIST)/completions/$$b.fish; \
+	done
+
+rpm: build rpm-package
+
+rpm-package:
+	./scripts/build-rpm.sh $(VERSION)
+
+# Bump helpers — reads the latest semver tag and creates the next one.
+_LATEST := $(shell git tag --sort=-v:refname | grep -E '^v[0-9]+\.[0-9]+\.[0-9]+$$' | head -1)
+_BASE   := $(if $(_LATEST),$(_LATEST),v0.0.0)
+_MAJ    := $(shell echo $(_BASE) | sed 's/^v//' | cut -d. -f1)
+_MIN    := $(shell echo $(_BASE) | sed 's/^v//' | cut -d. -f2)
+_PAT    := $(shell echo $(_BASE) | sed 's/^v//' | cut -d. -f3)
+
+patch:
+	@NEW=v$(_MAJ).$(_MIN).$(shell expr $(_PAT) + 1); \
+	git tag $$NEW && echo "Tagged $$NEW" && $(MAKE) _tag TAG=$$NEW
+
+minor:
+	@NEW=v$(_MAJ).$(shell expr $(_MIN) + 1).0; \
+	git tag $$NEW && echo "Tagged $$NEW" && $(MAKE) _tag TAG=$$NEW
+
+major:
+	@NEW=v$(shell expr $(_MAJ) + 1).0.0; \
+	git tag $$NEW && echo "Tagged $$NEW" && $(MAKE) _tag TAG=$$NEW
+
+_tag:
+	git push origin $(TAG)